Merge pull request #25 from shane-tomlinson/hookup-set-password

go to new user flow if email address is newuser@newuser.com
Merge pull request #26 from shane-tomlinson/moar-server-mocks

Add "createAccount" and "requestPasswordReset" mocks in FxModuleServerRequest.

I'm taking drastic measures for others in the team to see the full flow; we can make necessary updates in round 2!
String updates

* Ensure the strings match the mocks.
* Prepare strings for l10n - add strings to fxa.en-US.properties and give each element with strings a data-l10n-id
Merge pull request #22 from shane-tomlinson/l10n-template-strings

Prepare strings for l10n - add strings to fxa.en-US.properties and give ...

Thanks @sergi!
Hook up the TOS/PP agreements.

* fxam_ui.js - Ensure transitions work for panels that do not have JS modules.
* fxam_navigation.js - Ensure initialization, back work for panels that do not have JS modules.
* Extract function refactorings in fxam_navigation.js & fxam_ui.js for readability
* In templates, convert h2 to h3 to go along with h3 CSS changes in #23